55865316 has 60 divisors (see below), whose sum is σ = 142081072. Its totient is φ = 17083872.

The previous prime is 55865311. The next prime is 55865323. The reversal of 55865316 is 61356855.

It is a super-4 number, since 4×55865316⁴ (a number of 32 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (55865311) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 342651 + ... + 342813.

Almost surely, 2^55865316 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55865316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71040536).

55865316 is an abundant number, since it is smaller than the sum of its proper divisors (86215756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55865316 is a wasteful number, since it uses less digits than its factorization.

55865316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 181 counting only the distinct ones).

The product of its digits is 108000, while the sum is 39.

The square root of 55865316 is about 7474.3104029736. The cubic root of 55865316 is about 382.2792745921.

The spelling of 55865316 in words is "fifty-five million, eight hundred sixty-five thousand, three hundred sixteen".